1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_channelSplitterNodeWithVolume.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test ChannelSplitterNode</title>
1.8 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <script type="text/javascript" src="webaudio.js"></script>
1.10 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.11 +</head>
1.12 +<body>
1.13 +<pre id="test">
1.14 +<script class="testbody" type="text/javascript">
1.15 +
1.16 +// We do not use our generic graph test framework here because
1.17 +// the splitter node is special in that it creates multiple
1.18 +// output ports.
1.19 +
1.20 +SimpleTest.waitForExplicitFinish();
1.21 +addLoadEvent(function() {
1.22 + var context = new AudioContext();
1.23 + var buffer = context.createBuffer(4, 2048, context.sampleRate);
1.24 + var expectedBuffer = context.createBuffer(4, 2048, context.sampleRate);
1.25 + for (var j = 0; j < 4; ++j) {
1.26 + for (var i = 0; i < 2048; ++i) {
1.27 + buffer.getChannelData(j)[i] = Math.sin(440 * 2 * (j + 1) * Math.PI * i / context.sampleRate);
1.28 + expectedBuffer.getChannelData(j)[i] = buffer.getChannelData(j)[i] / 2;
1.29 + }
1.30 + }
1.31 + var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
1.32 +
1.33 + var destination = context.destination;
1.34 +
1.35 + var source = context.createBufferSource();
1.36 +
1.37 + var splitter = context.createChannelSplitter();
1.38 + is(splitter.channelCount, 2, "splitter node has 2 input channels by default");
1.39 + is(splitter.channelCountMode, "max", "Correct channelCountMode for the splitter node");
1.40 + is(splitter.channelInterpretation, "speakers", "Correct channelCountInterpretation for the splitter node");
1.41 +
1.42 + source.buffer = buffer;
1.43 + var gain = context.createGain();
1.44 + gain.gain.value = 0.5;
1.45 + source.connect(gain);
1.46 + gain.connect(splitter);
1.47 +
1.48 + var channelsSeen = 0;
1.49 + function createHandler(i) {
1.50 + return function(e) {
1.51 + is(e.inputBuffer.numberOfChannels, 1, "Correct input channel count");
1.52 + if (i < 4) {
1.53 + compareBuffers(e.inputBuffer.getChannelData(0), expectedBuffer.getChannelData(i));
1.54 + } else {
1.55 + compareBuffers(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
1.56 + }
1.57 + e.target.onaudioprocess = null;
1.58 + ++channelsSeen;
1.59 +
1.60 + if (channelsSeen == 6) {
1.61 + SimpleTest.finish();
1.62 + }
1.63 + };
1.64 + }
1.65 +
1.66 + for (var i = 0; i < 6; ++i) {
1.67 + var sp = context.createScriptProcessor(2048, 1);
1.68 + splitter.connect(sp, i);
1.69 + sp.onaudioprocess = createHandler(i);
1.70 + sp.connect(destination);
1.71 + }
1.72 +
1.73 + source.start(0);
1.74 +});
1.75 +
1.76 +</script>
1.77 +</pre>
1.78 +</body>
1.79 +</html>
